CH117475A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

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Publication number
CH117475A
CH117475A CH117475DA CH117475A CH 117475 A CH117475 A CH 117475A CH 117475D A CH117475D A CH 117475DA CH 117475 A CH117475 A CH 117475A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
oxyazo
pyrazolone
methyl
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH117475A publication Critical patent/CH117475A/en

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Description

  

  Verfahren zur Darstellung eines     o-Oayazofarbstoffes.       Es wurde gefunden, dass man einen Farb  stoff von ähnlichen guten Echtheitseigen  schaften wie die des in dem Hauptpatent  beschriebenen erhält, wenn man an Stelle  von     2-Diazo-4-nitro-l-oxybenzol-6-sulfosäure          Naphthalin-1        .2-diazoxyd-4.6-disulfosäure    mit       1-ss-Naphthyl-3-methyl-5-pyrazolon    kuppelt.

         Beispiel:     Zu einer     Aufschlemmung    von 22,6 Teilen       1-i3-Naphthyl-3-methyl-5-pyrazolon    in der     10-          fachen    Menge Wasser gibt man 46,7 Teile       naphtbalin    -1 . 2 -     diazoxyd    - 4 . 6 -     disulfosaur    es  Barium und 10 Teile wasserfreies Natrium  karbonat zu.     plan    rührt bis die Kupplung    vollendet ist, säuert mit Essigsäure an und  trennt den ausgeschiedenen     Farbstoff    von der  Lauge. Der Chromlack des Farbstoffes auf  Wolle ist     bläulich-rot.  



  Process for the preparation of an o-oayazo dye. It has been found that a dye with good fastness properties similar to that described in the main patent is obtained if naphthalene-1,2-diazoxide is used instead of 2-diazo-4-nitro-1-oxybenzene-6-sulfonic acid -4.6-disulfonic acid couples with 1-ss-naphthyl-3-methyl-5-pyrazolone.

         Example: To a slurry of 22.6 parts of 1-13-naphthyl-3-methyl-5-pyrazolone in 10 times the amount of water are added 46.7 parts of naphtbalin -1. 2 - diazoxide - 4. 6 - disulfosaur es barium and 10 parts anhydrous sodium carbonate to it. Stir flat until the coupling is complete, acidify with acetic acid and separate the precipitated dye from the lye. The chrome lacquer of the dye on wool is bluish-red.

Claims (1)

PATENTANSPRUCH Verfahren zur Darstellung- eines o-Oxyazo- farbstoffes von guten Echtheitseigenschaften, der als Chromlack auf Wolle bläulich-rot ist, dadurch gekennzeichnet, dass man Naphthalin- 1. 2-diazoxyd-4.6-disulfosäure mit I-.@-Naph- thyl-3-methyl-5-pyrazolon kuppelt. PATENT CLAIM A process for the preparation of an o-oxyazo dye with good fastness properties, which is bluish-red as a chrome lacquer on wool, characterized in that naphthalene-1,2-diazoxyd-4,6-disulfonic acid is mixed with I - -3-methyl-5-pyrazolone couples.
CH117475D 1924-04-19 1925-04-18 Process for the preparation of an o-oxyazo dye. CH117475A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE117475X 1924-04-19
CH115939T 1925-05-18

Publications (1)

Publication Number Publication Date
CH117475A true CH117475A (en) 1926-11-01

Family

ID=25708615

Family Applications (1)

Application Number Title Priority Date Filing Date
CH117475D CH117475A (en) 1924-04-19 1925-04-18 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH117475A (en)

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